SG29085

Input Voltage (VIN) Operating ..............................................26V
Input Voltage (VIN) Overvoltage Transient ..............-15V to 60V
ON/OFF Switch ............................................................-0.3V to V
Storage Temperature Range (TSTG) ..................-65°C to 150°C
Operating Junction Temperature (TJ) ...............................150°C

The SG29085/85A is a dual 8.2V/5V positive voltage regulator. One output is a high current (up to 1000 mA) regulator that can be turned on or off by a high impedance low current TTL compatible switch. The second or standby output remains on regardless. The on/off switch not only shuts off the high current output but actually puts the IC in a micropower mode making possible a low quiescent current. This unique characteristiccoupled with an extremely low dropout, (.55V for output current of 10mA) makes the SG29085/85A well suited for power systems that require standby memory. The SG29085/85A includes other features which were originally designed for automotive applications. These include protection from reverse battery installations and double battery jumps. The high current regulator has overvoltage shutdown to protect both the internal circuitry and the load during line transients, such as load dump (60V). In addition, the high current regulator design also has built-in protection for short circuit and thermal overload. During these fault conditions of the primary regulator the standby regulator will continue to power its load.

The SG29085 is the 8.2 volt, ±5% version of a family of dual regulators with a standbyoutput voltage of 5V. Other high current outputs of 5 and 12 volts are available. Alsoavailable is the SG28085A which offers an improved output voltage tolerance of ±2%.
They are available in the plastic TO-220 power package and are designed to function
over the automotive ambient temperature range of -40°C to 85°C.